Left 4 Dead 2 is now free to play this entire weekend. If you are new to the Left 4 Dead world, we have a list of tips below. If you have been around for a bit, don’t forget we have the Good Guy Nick achievement for you to earn starting today.

Additionally, to help find players and start games or just talk about Left 4 Dead 2, join us in the here in chat. Devs will be hanging out in chat and in games from 10am to 6pm PST this Saturday.

If you are brand new to the game, here are some tips for you:
#1 – Play Campaign First – there are many different game modes available, but all rest rely on the skills you will learn in Campaign Mode.
#2 – Talk. Hook-up your microphone. Don’t worry, you don’t need to talk non-stop but having the option to call out for help when you really need it is invaluable.
#3 – Stay Together. Left 4 Dead is all about playing with a group. You need to stay with your group or you will die. Some of the special creatures can incapacitate you and the only way you can be saved is by your teammates.
#4 – Make Friends. If you meet players you work well with – add them to your Steam friends to play with them again. To date we have four marriages (we know of) and countless friendships created by people who met playing Left 4 Dead.
#5 – Join the Community. Participate in the discussion, view clips, see screenshots, and read news on our Steam Community hub. Check back on the blog as we will be updating every day this weekend. The community has even provided some valuable feedback and tips for new players in two forum posts available here and here. Don't be scared to ask questions in the forums or in the game. You can't survive the zombie apocalypse alone.

Left 4 Dead 2 is now free to play this entire weekend. If you are new to the Left 4 Dead world, we have a list of tips below. If you have been around for a bit, don’t forget we have the Good Guy Nick achievement for you to earn starting today.

Additionally, to help find players and start games or just talk about Left 4 Dead 2, join us in the Official Game Groupchat this Saturday. Devs will be hanging out in chat and in games from 10am to 6pm PST this Saturday.

To celebrate Halloween, say Valve, they’re making Left 4 Dead 2 free this weekend. And by weekend, they mean from today (Thursday) until Monday. And by Halloween, they mean stopping days short of Halloween. Ladies and gentlemen: Valve Time.

Free to play "weekends" seem to be getting bigger and bigger, but you don't hear me complaining. As a relaxing aside to the spooky Halloween weather some of us will be experiencing, Valve's calming co-op zombie apocalypse shooter, Left 4 Dead 2, will be entirely free from today through to Monday. The expiry date is moot, however, as we'll all have been eaten by ghosts by then.

To tempt Left 4 Dead veterans back into the fray, Valve have added a new achievement called "Good Guy Nick" which will be awarded to those who help new players to survive a campaign. "Who is a free weekend player? You’re going to have to talk to each other to find out." Talking to people? On the INTERNET? 'Tis Halloween indeed.

Left 4 Dead 2 will go free at some point today according to the latest post on the Left 4 Dead 2 blog.

To celebrate Halloween, we are unleashing L4D2 on the world. Starting this Thursday, the entire game will be free to play for the whole weekend. New players can begin pre-loading now. For long time players, it is time to welcome your new found friends and help them survive the zombie apocalypse.

For current players, we created a new achievement. Good Guy Nick - – “Plays games with free weekend players and helps them survive a campaign.” Who is a free weekend player? You’re going to have to talk to each other to find out or you could always let your friends know Left 4 Dead 2 is going to be free this weekend and have them join you. Spread the word! It’s the zombie apocalypse, bring friends.

To preload or install the game, you can <a href='steam://install/550'>click this link</a>.

To celebrate Halloween, we are unleashing L4D2 on the world. Starting this Thursday, the entire game will be free to play for the whole weekend. New players can begin pre-loading now. For long time players, it is time to welcome your new found friends and help them survive the zombie apocalypse.

We're fast-approaching the celebration of gluttony and cheap costuming that is Halloween, wherein we scare ghosts and demons back into the spirit world by dressing up like political figures and scantily clad nurses. Left 4 Dead 2 is a little on the spooky side, so Valve is letting you trick your treats with a free weekend of the game.

The free period begins on Thursday, with the whole game available to try out. You can begin pre-loading the game now, if you want to jump on the opportunity. For you old hands at L4D2, it also includes a new achievement to chase. The "Good Guy Nick" achievement rewards you for helping a free weekend player survive a campaign. You'll just have to suppress your frustration when they keep shining their flashlight straight at the Witch.

Halloween is on its way, and while ghosts and ghouls may have been the undead horrors of decades past, here in 2012 it's all about the zombies and their ilk.

What better way to get in the mood for spooky doom than with this weirdly lovely, thoroughly instructive image from Left 4 Dead 2? See zombie, apply flamethrower. Now that's useful advice for the ages.